Spinoza: what can a body do?

In affect, we are never alone. That’s because affects in Spinoza’s definition are basically ways of connecting, to others and to other situations. They are our angle of participation in processes larger than ourselves. With intensified affect comes a stronger sense of embeddedness in a larger field of life — a heightened sense of belonging, with other people and to other places. Spinoza takes us quite far, but for me his thought needs to be supplemented with the work of thinkers like Henri Bergson, who focuses on the intensities of experience, and William James, who focuses on their connectedness.

(Brian Massumi)

see also: Deleuze, Gilles. Expressiom in Philosophy: Spinoza. (Joughin M. trans.) Zone Books, New York: 1992.